Lenovo T420, ThinkPad. Processor clock speed: 2.5 GHz, Processor family: Intel Core i5, Processor model: i5-2520M. Internal memory: 4 GB, Internal memory type: DDR3-SDRAM, Memory clock speed: 1333 MHz. Total storage capacity: 320 GB, Hard drive capacity: 320 GB, Hard drive interface: Serial ATA II. Display diagonal: 355.6 mm (14 "), Display resolution: 1366 x 768 pixels, Aspect ratio: 16:9. Discrete graphics adapter model: Intel HD Graphics 3000, Maximum resolution: 2560 x 1600 pixels